Mustafa G, Akber G, Lodhi JK, Mutahir M, Malik A. UMBILICAL PILONIDAL SINUS. J Ayub Med Coll Abbottabad [Internet]. 2014 Mar. 1 [cited 2025 Jun. 4];26(1):100-1. Available from: https://jamc.ayubmed.edu.pk/index.php/jamc/article/view/1645